JPH1155315A - Receiving, recording and reproducing device for digital broadcast signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To record an optional packet to a recording/reproducing device in an optional timing and to automatically select the programs in a reproduction mode by setting a mode at a packet replacement circuit to replace all packets with the replacement data. SOLUTION: A packet separation circuit 9 acquires a packet related to a program A from an input stream 80 and also acquires a PAT extraction/ separation stream 45. At the same time, a packet replacement circuit 10 replaces PMT of the program A with PAT of only PID and outputs an output stream 48. An interface circuit 11 applies the parallel/serial conversion, for example, to the stream 48 and outputs this stream to a recording/reproducing device 12 to record it there. In a reproduction mode, the signals reproduced by the device 12 undergo the serial/parallel conversion via the circuit 11 and are inputted to a 1st separation packet means 6 via a switch 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television signal receiving and recording / reproducing apparatus, and more particularly to a digital broadcast signal receiving and recording / reproducing apparatus for recording and reproducing a digital signal as it is.

[0002]

2. Description of the Related Art As a conventional technique for recording and reproducing a digital signal, a receiving system and a recording / reproducing apparatus for receiving and recording a digital signal transmitted by multiplexing a plurality of pieces of information are disclosed in JP-A-8-98164. It is stated in. In the above-mentioned conventional technique, a receiving means for receiving a digital information signal transmitted by multiplexing a plurality of information and selecting desired information, and a recording means for recording the information received by the receiving means are provided. A receiving system is described. Japanese Patent Application Laid-Open No. H8-5635 discloses a technique for selecting a desired program when presenting a program by receiving a digital signal transmitted by multiplexing a plurality of pieces of information.
0. In the conventional technique, a plurality of programs are packetized by adding packet identifiers, and transmission control data indicating the correspondence between the programs and the packet identifiers is also packetized. Each of these packets is multiplexed. Describes a device for searching for each program from a multiplexed signal transmitted by electronic mail.

[0003]

SUMMARY OF THE INVENTION The aforementioned Japanese Patent Laid-Open No. 8-98
The prior art described in H.164 does not describe a method of separating and reproducing only information relating to a desired program from information multiplexed during reproduction of a recorded program. On the other hand, in the prior art described in Japanese Patent Application Laid-Open No. 8-56350, a search means for extracting and presenting a desired signal from a multiplexed digital signal is described. However, for example, a conventional analog V
In general, when a program recorded in a TR is to be reproduced, it can be reproduced by simply pressing a reproduction switch without any other operation.
Even when the digital information signal technology described in Japanese Patent No. 98164 and the technology described in Japanese Patent Application Laid-Open No. 8-56350 are combined, a troublesome operation such as a program search must be performed during reproduction. A method of reproducing a desired program immediately recorded by simply pressing one switch like a system VTR cannot be realized.

An object of the present invention is to provide a digital broadcast signal receiving and recording / reproducing apparatus capable of immediately reproducing a program recorded as a digital signal without any troublesome operation as in the case of the analog VTR. With the goal.

[0005]

In a system for multiplexing and transmitting all video, audio, data, and the like as digital information into one bit string of a predetermined packet format, at least receiving the transmitted digital information, Input processing means for demodulating a bit string having a predetermined packet structure, packet separation means for extracting a specified packet from an output bit string of the input processing means, and part or all of the packets output from the packet separation means , A packet replacement unit that replaces the output signal with a predetermined signal, an output unit that outputs an output signal of the packet replacement unit to the inside or outside, and a control unit that controls operations of the packet separation unit and the packet separation unit. And a packet replacement means for temporarily storing the input signal. A time storage means, and detecting means for detecting a specific signal from the signal stored in the temporary storage means,
First storage means and second storage means for storing a signal input from the control means, and comparison means for comparing a signal detected by the detection means with a signal stored in the first storage means. And selecting means for selecting either the input signal or the signal stored in the temporary storage means or the signal stored in the second storage means according to the result of the comparison means.

[0006]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a block configuration of a digital broadcast signal receiving and recording / reproducing apparatus according to the present invention. In the following description, antenna 1 is a Quadrature Pha
An example of receiving a satellite broadcast wave digitally modulated by the se Shift Keying (hereinafter abbreviated as QPSK) system will be described. By this, the transmission system used in the present invention is limited to satellite broadcasting, and the modulation system is limited to the QPSK system. It does not do. Also, an example in which an international standard Moving Picture Experts Group 2 (hereinafter abbreviated as MPEG2) is used as a signal compression and decompression method is shown. However, the signal compression and decompression method used in the present invention is not limited to MPEG2. Absent.

In FIG. 1, 1 is an antenna, 2 is a tuner, 3 is a QPSK demodulation circuit, 4 is Forward Error Correction (hereinafter abbreviated as FEC) for correcting a signal error accompanying transmission, 5 is a switch, and 6 is a first switch. Packet separation circuit, 7
Is an MPEG2 decoder, 8 is a video and audio output terminal, 9
Is a second packet separation circuit, 10 is a packet replacement circuit,
11 is an interface circuit, 12 is a recording / reproducing device, 1
3 is a system controller, and 14 is an output circuit.

In FIG. 1, a radio wave transmitted from a satellite (not shown) is received by an antenna 1 and input to a tuner 2. In the example shown in FIG. 1, the tuner 2 selects and outputs a desired signal from input signals in accordance with the setting of the system control 13. The output of the tuner 2 is QPSK
The signal is demodulated by the demodulation circuit 3 and input to the FEC 4. FEC
Numeral 4 corrects errors in the input digital signal accompanying the transmission.

The digital signal obtained by correcting the error of the input signal as described above is passed through the switch 5 to the first signal.
The operation when input to the packet separation circuit 6 is described. The digital satellite broadcasting described in the present invention is generally a radio relay transponder (not shown) mounted on a satellite.
Is characterized in that a plurality of programs can be multiplexed on a single radio wave relayed by. The first packet separation circuit 6 selects a desired program from the multiplexed programs. The signal separated by the first packet separation circuit 6 is input to the MPEG2 decoder 7. The MPEG2 decoder 7 expands the compressed digital signal and reproduces the digital video signal and digital audio signal before compression. The reproduced digital video signal and digital audio signal are output to an output circuit 14.
Are converted into analog signals, respectively, and output from the video and audio output terminals 8. The above operation is controlled by the system control 13.

In the above description, an example of a general procedure for separating desired program information in the first packet separation circuit 6 will be described with reference to FIGS. The signal input to the first packet separation circuit 6 has a configuration in which the packets shown in FIG. 2A are multiplexed. FIG. 2B shows an example of multiplexing. The operation described below is performed by processing the multiplexed signal in the first packet separation circuit 6 as shown in FIG.

FIG. 2C shows an example of the configuration of the header 20 shown in FIG. 2A. Reference numeral 23 denotes a synchronous byte which is a fixed pattern indicating the beginning of the header.
4 is a transport error indicator, 25 is a payload unit start indicator, 26 is a transport priority, 27 is a PID indicating a packet attribute, 28 is a transport scramble control, 29 is an adaptation field control, and 30 is a continuity damage. , Indicate various attributes and states of the packet.
It consists of 4 bytes. Each number represents the number of bits.

FIG. 3 shows an example of the operation of the first packet separation circuit 6. First, in step 201, the viewer inputs the organization channel of the program desired to be viewed. An organization channel is a method of summarizing video, audio, and the like that constitute one program, and corresponds to a television channel in conventional analog broadcasting. In digital broadcasting, one frequency in which a plurality of programs are multiplexed is generally called a physical channel. Next, in step 202, a PAT (Program Association Table) included in the currently received multiplexed signal (= Transport Stream, hereinafter referred to as TS) is received. PAT is a PSI (Program Specific Information Format) defined in the MPEG2 international standard.
on) is one of the tables. In step 203, a desired organization channel is searched from the PAT received in step 202. If there is a desired composition channel, the process proceeds to step 207. If there is no desired organization channel, the process proceeds to step 204, where an NIT (Network Information Table), which is one of the PSI and describes the relationship between the organization channel and the physical channel, is received.
A physical channel including a desired organization channel is acquired, and in the next step 205, the process proceeds to the physical channel acquired in step 204. The transition of the physical channel is performed in an actual circuit as shown in FIG.
This is performed by setting a frequency to be tuned to the tuner 1 from the system controller 13. Then step 2
At 06, the PAT of the TS in the physical channel after the shift is received. Upon receiving the PAT, a PMT (Program Map Tabl) in which PIDs such as video and audio constituting the composition channel input in step 207 are described.
e) Obtain the PID (Packet ID) from the PAT,
Receive a PMT having an ID. However, PMT is PSI
PID is a packet identifier included in the header of the packet, as shown in FIG. 2C. The PMT has a PC indicating video, audio, and time information constituting each composition channel included in the TS being received.
Since the PID such as R (Program Clock Reference) is described, in step 208, the PID of the video, audio, PCR, etc. of the desired program is obtained. After that, the acquired PID is set in the first packet separation circuit 6 in step 209, a desired video and audio stream is extracted, a program stream 101 is obtained, and input to the MPEG2 decoder 7 for decoding and the like. The decoded video signal and audio signal are processed by the output circuit 14, converted into analog signals, output from the video and audio output terminals, and received by an external television (not shown), so that the viewer desires. A program can be presented.

Next, a procedure for recording a signal received by the recording / reproducing device 12 through the second packet separating circuit 9 and reproducing a signal from the recording / reproducing device 12 through the switch 6 will be described.

The second packet separating circuit 9 is means for extracting data necessary for a viewer to reproduce only a desired program at the time of reproduction after recording. During playback, the first
Since a packet is required in addition to the signal extracted by the packet separation circuit 6, a stream different from the program stream 101 is required. In the embodiment of FIG. 1, in addition to the above-described TSs such as PAT, PMT, video, and audio, a PCR (Program Clock Reference) which is data indicating time information required by the MPEG2 decoder 7 and program-related information Information on a desired program (currently viewed program) is extracted and recorded on the recording / reproducing device 12 via the packet replacement circuit 10 and the interface circuit 11.

An object of the present invention is to automatically select a program of a recorded signal at the time of reproduction by the recording / reproducing apparatus 12.
Record after replacing T.

The operation of the packet replacement circuit 10 will be described below.

FIG. 4 shows an example of the configuration of a packet replacement circuit. 44 is a buffer for temporarily storing data of about several bytes, 40 is a PID detection circuit for detecting a PID 27 from the data stored in the buffer, Reference numeral 41 denotes a PID coincidence circuit for comparing the PID detected by the PID detection circuit 40 with a predetermined value; 42, a storage circuit for storing data after replacement; 46, an output of the buffer 44 or an output of the storage circuit 42; A selection circuit 54 for selecting whether or not, a timing generation circuit 54, and a PID register 56 for storing a predetermined PID input from the system control 13.

FIG. 5 shows the operation timing. This packet replacement circuit operates in byte units, and the input packet 45 and the like are all 8-bit parallel signals. Although not shown in FIG. 4, it operates in synchronization with the byte clock 60 shown in FIG.

The separated stream 45 output from the second packet separating circuit 9 is sequentially stored in the buffer 44 for several bytes. In FIG. 5, data of each stage stored in the buffer 44 is stored in the buffer 1 (52) and the buffer 2 (5).
3), buffer 3 (61), and buffer 4 (46). Also, an enable 70 indicating the section of the input packet
However, this may be output from the second packet separation circuit 9 or may be generated from the synchronization byte 23 by the timing generation circuit 54.

The PID (replacement PID) of the packet to be replaced is input in advance by the system control 13, stored in the PID register 56, and the replacement data (replacement data) is input from the system control 13 to the storage circuit 42. Remember. Note that the storage circuit 42 may be configured to be able to store a plurality of packet data.

The detection clock 63 is generated from the enable 70 by the timing generation circuit 54. Timing 6
At time point 4, the output 8 bits of buffer 1 and the buffer 2
13 bits of the lower 5 bits of PID27 become PID27.
The PID matching circuit 41 compares the detected PID 55 detected by the PID detection circuit 40 with the replacement PID 57 stored in the PID register 56, and if they match, sets the detection result 51 to H as indicated by 65. If they do not match, it remains at L as indicated by the broken line 66. The selection circuit 46 selects a when the detection result 51 is L, and selects b when the detection result 51 is H.
When the number matches 57, the replacement data 47 output from the storage circuit 42 is output. Thus, the entire packet having a predetermined PID can be replaced with arbitrary data. The output timing of the storage circuit 42 is controlled by the timing generation circuit 54. If they do not match, the output 46 of the buffer 44 is output as it is.

Thus, the PAT in which the PIDs of a plurality of PMT packets for a plurality of programs multiplexed in one input stream 80 are written is replaced with the PID of only the PMT packet of the currently recorded program only. It is possible to replace the PAT. In other words, the PAT of the PAT may be stored in the PID register by the system control 13, and the PAT of only the PID of the PMT packet of only the program to be recorded may be stored in the storage circuit 42.

FIG. 6 is a timing chart showing an example of the operation of packet separation and packet replacement, wherein reference numeral 80 denotes an input stream input to the second packet separation circuit 9, and reference numeral 45 denotes one of the second packet separation circuits 9. Reference numeral 48 denotes an output stream which is an output of the packet replacement circuit 10 which is separated from only a program.
A, _B, and _C indicate packets related to A program, B program, and C program, and SI indicates packets other than video and audio.

The packet separating circuit 9 extracts a packet relating to the A program and the PAT from the input stream 80, and obtains a separated stream 45. PAT at this point
In (81, 83), the PIDs of the PMTs of all the ABC programs are written.
2, 84) and output stream 48 is output. This output stream 48 is transmitted to the interface circuit 1
For example, parallel-serial conversion or the like is performed by 1 and output to the recording / reproducing device 12 for recording.

At the time of reproduction, the signal reproduced by the recording / reproducing device 12 is converted from serial to parallel by the interface circuit 11 and input to the first separation packet means circuit 6 via the switch 5. When reproducing a signal recorded in the recording / reproducing device 12, the first packet separating circuit 6 is controlled by the system control 13 and operated according to the procedure shown in FIG. Hereinafter, the operation will be described. In general, a PID indicating program-related information is indicated by a specific value irrespective of a program, and the present embodiment will be described on the premise of this.

When a signal is input from the recording / reproducing device 12 via the interface circuit 11 and the switch 5, the first
In step 442, the packet separation circuit 6
To receive. This PAT contains the recorded video for one program,
Since only the PMT of the PMT in which the PID such as voice is described is written, the desired PID can be obtained immediately. The following procedure is the same as that described in FIG.

As described above, in this embodiment, a program reproduced from the recording / reproducing apparatus 12 which records a program in the state of a multiplexed digital signal can be automatically reproduced without complicated operations by a viewer. Demultiplexed, decoded, and presented. Furthermore, since desired program-related information is recorded, services using information on programs, which is one of the features of digital broadcasting, can be enhanced.

In the above description, the packet replacement circuit 10 replaces the entire packet. However, when replacing the PAT, the header 20 is kept as it is, and only the data 21 is replaced. It may be immediately after 20. FIG. 8 shows the configuration of the replacement circuit 10 in this case, and FIG. 9 shows the operation timing. In FIG.
The input a of the selection circuit 43 is a separated stream 45 before the buffer 44. The timing of the detection clock 63 shown in FIG. 9 and the timing at which the detection result 51 becomes H are the same as those in FIG. 5, but the input a of the selection circuit 43 is at the time when the header 20 has just finished, and only the data 21 is replaced. Is done. With this configuration, the storage capacity of the buffer 44 can be reduced, and the circuit scale can be reduced.

5 and 9, the detection result 51
Is returned to L after the end of the output of the last data of the packet, but may be switched in the middle of the packet. Thus, it is possible to replace only a part of the data 21.

By providing a mode in which all the packets are replaced with replacement data in the packet replacement circuit 10, it is possible to record an arbitrary packet on the recording / reproducing apparatus 12 at an arbitrary timing. FIG. 10 shows an operation example in this case. In the figure, reference numeral 50 denotes an operation mode of the packet replacement circuit 10 controlled by the system controller 13, PAT replacement is a mode in which the above-described normal packet replacement is performed, and full replacement mode_1 is a mode in which all input separated streams Regardless of the PID, the storage circuit 4
2 is a mode for replacing with the first replacement data (which may be different from the replacement data to be replaced in the PAT replacement mode), and the all replacement mode_2 is a mode for similarly replacing with the second replacement data. is there. In all replacement mode,
The PID matching circuit 41 detects the PID 55 and the replacement PID 5
The detection result 51 may be set to H regardless of the value of 7. As shown in the output stream 48 of FIG. 10, under control of the replacement mode 50 from the system controller 13, any packet, PA1 (93 and 94), PA2 (95)
Can be recorded. The selection of PA1 and PA2 may be performed by determining the replacement mode 50 by the timing generation circuit 54 and controlling the storage circuit 42. Specifically, when a RAM is used for the storage circuit 42, the read address of the RAM may be switched.

This makes it possible to record, for example, a packet indicating a break in recording at the start and end of recording, and to detect an editing point of the recording and a change point of the program at the time of reproduction. With the separating means 6, it is possible to automatically reset or switch programs.

In the above case, if the time of the all replacement mode is short, there is no guarantee that a packet exists on the separated stream 45. Therefore, the separation operation by the second packet separation circuit 9 may be controlled to allow all packets to pass during the all replacement mode.

FIG. 11 shows the operation timing in this case. The system control 1 is provided to the second packet separation circuit 9.
3 provides an all-packet through mode. Reference numeral 100 denotes a separation mode. When L, the normal separation operation is performed, and when H, the whole packet through mode is set.

During the all replacement mode_1 and the all replacement mode_2, the second packet separation circuit 9 is set to the all packet output mode, so that 101-105 on the separated stream.
Are input to the packet replacement circuit 10, so that PA1 (106, 107, 108) and PA2 (10
9, 110) can be reliably recorded by the recording / reproducing apparatus 12.

In FIG. 1, the interface circuit 1
1 and the recording / reproducing device 12 are connected in common for input and output, but input and output may be separated. Further, in the above description, serial transmission is used, but parallel transmission may be used. In this case, the parallel-serial conversion in the interface circuit 11 becomes unnecessary. Also, the first packet separation circuit 6 and the second packet separation circuit 9 have been described as separate circuits, but these two means may be the same circuit block.

In the operation description of FIGS.
Although described as a bit parallel signal, it may be processed as, for example, a 16-bit parallel signal or a 1-bit serial signal.

6, 10, and 11, the input stream 80, the separated stream 45, and the output stream 48
Are written as the same timing. Actually, due to various processes, a delay of several bytes to several packets occurs between each stream, but is ignored here.

In the description of the packet replacement circuit 10,
Although the replacement of the PAT has been described, the header 20 and data 21 of another packet may be replaced.

Also, the value of the four bits of the continuity damage 30 in the header 20 may need to be changed for each packet. At this time, the system controller 13 may rewrite the continuity damage 30 or the data of 8 bits (1 byte) including the continuity damage 30 on the storage circuit 42 every time the packet is replaced. For this purpose, although not shown in FIG. 4 and the like, the detection result 51 may be input to the system control 13 so as to recognize that the packet has been rewritten.

Further, a CRC code for error check is added to the actual packet data 21. The CRC of the replacement data may be calculated by the system control 13, or the CRC may be stored in the packet replacement circuit 10. A generation circuit may be provided (not shown) to generate and add the data.

In the description of the present embodiment, a dedicated packet replacement circuit 10 is provided for packet replacement. However, replacement may be performed in the block of the first packet separation circuit 9. Further, packet replacement may be performed simultaneously with or before packet separation. Alternatively, each packet may be fetched once by the system controller 13 and replaced by the system controller. When the operation is performed by the system controller 13, a high-speed CPU is required because the load increases, but there is an advantage that the replacement operation is flexible.

Also, in this description, whether to perform packet replacement is determined by the PID 27 in the header 20. However, other data in the header 20 or specific data in the data 21 may be used.

Although the buffer 44, the storage circuit 42, and the PID register 56 are separate circuits in FIGS. 4 and 8, they may be used as one or two storage circuits.

[0045]

According to the present invention, it is possible to automatically select a program at the time of reproduction in a recording / reproducing apparatus for digital broadcasting. In addition, since any packet can be recorded at any time, it is possible to detect a break in recording or a program at the time of reproduction, reset at a recording edit point or a break in a program, or perform automatic channel selection. be able to.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a packet structure and a packet multiplexing method.

FIG. 3 is a diagram showing a procedure of program presentation.

FIG. 4 is a diagram showing a first configuration of a packet replacement circuit.

FIG. 5 is a timing chart showing the operation of the packet replacement circuit of FIG. 4;

FIG. 6 is a timing chart showing a state of packet separation and replacement.

FIG. 7 is a diagram showing a procedure for presenting a program during reproduction.

FIG. 8 is a diagram showing a second configuration of the packet replacement circuit.

FIG. 9 is a timing chart showing the operation of the packet replacement circuit of FIG. 8;

FIG. 10 is a timing chart showing a first operation in the all replacement mode.

FIG. 11 is a timing chart showing a second operation in the all replacement mode.

[Explanation of symbols]

5 switch, 6 first packet separation circuit, 9 second
Packet separation circuit, 10 ... packet replacement circuit, 12 ...
Recording / reproducing apparatus, 13: system control, 20: header, 27: PID, 40: PID detection circuit, 41: P
ID matching circuit, 42 ... storage circuit, 43 ... selection circuit, 44
... buffer, 45 ... separated stream, 48 ... output stream, 54 ... timing generation circuit, 56 ... timing generation circuit, 80 ... input stream,

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code FI H04N 7/081 (72) Inventor Yuji Yamamoto 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Pref. Hitachi, Ltd. Multimedia System Development Headquarters

Claims (16)

[Claims] 1. A system in which a knitting channel is constituted by video, audio, data, etc., and signals of the plurality of knitting channels are multiplexed as digital information into one bit string of a predetermined packet format and transmitted. Input processing means for receiving the transmitted digital information and demodulating it into a bit string having a predetermined packet structure; packet separating means for extracting a designated packet from an output bit string of the input processing means; and Packet replacement means for replacing a part or all of the output packet with a predetermined signal; output means for outputting an output signal of the packet replacement means to the inside or outside; the packet separation means and the packet Characterized by comprising control means for controlling the operation of the separating means Digital broadcasting signal receiving device. 2. The digital broadcast signal receiving apparatus according to claim 1, wherein said packet separating means temporarily stores an input signal, and a specific signal based on the signal stored in said temporary storing means. Detecting means, a first storing means and a second storing means for storing a signal inputted from the control means, a signal detected by the detecting means and stored in the first storing means. Comparing means for comparing signals, and selecting means for selecting whether the input signal or the signal stored in the temporary storage means or the signal stored in the second storage means according to the result of the comparison means, When the signal has a predetermined value, a part or the whole of the packet including the specific signal is transmitted to the second signal.
A digital broadcast signal receiving apparatus, wherein the digital broadcast signal is replaced with a signal stored in the storage means. 3. The digital broadcast signal receiving apparatus according to claim 2, wherein the specific signal is at least ID information indicating an attribute of the packet. 4. The digital broadcast signal receiving apparatus according to claim 2, wherein the packet to be replaced by said packet replacement means is a packet having at least information on the selection of said organization channel. For receiving digital broadcast signals. 5. The digital broadcast signal receiving apparatus according to claim 1, wherein said packet separating means stores a signal input from said control means, and said packet separation means controls said input signal according to control of said control means. A digital broadcast signal, characterized by replacing a part or the entirety of a packet with a signal stored in the storage means under the control of the control means. Receiver. 6. The digital broadcast signal receiving apparatus according to claim 2, wherein said selection means is either said input signal or a signal stored in a temporary storage means or said second storage means under the control of said comparison means and said control means. The signal stored in the means is selected, and when the specific signal has a predetermined value, a part or the whole of a packet including the specific signal is converted to a signal stored in the second storage means. A digital broadcast having a first mode for replacement and a second mode for replacement with a signal stored in the second storage means irrespective of the value of the specific signal under the control of the control means. Signal receiving device. 7. The digital broadcast signal receiving apparatus according to claim 6, wherein said second storage circuit stores a plurality of types of signals, and controls an output from said second storage means according to control of said control means. A digital broadcast signal receiving apparatus, comprising: an output control unit that performs a selection operation, wherein the control unit can select a packet signal after the replacement performed by the replacement unit. 8. The digital broadcast signal receiving apparatus according to claim 5, wherein said separating means includes a normal mode for extracting a designated packet and a through mode for extracting all packets. A digital broadcast signal receiving apparatus, wherein at least when the packet replacement unit is in the second mode, the separation unit is in a through mode. 9. A system in which a knitting channel is constituted by video, audio, data, etc., and signals of the plurality of knitting channels are multiplexed as digital information into one bit string of a predetermined packet format and transmitted. Input processing means for receiving the transmitted digital information and demodulating it into a bit string having a predetermined packet structure; packet separating means for extracting a designated packet from an output bit string of the input processing means; and Packet replacement means for replacing part or all of the output packets with a predetermined signal; recording / reproduction means for recording / reproducing an output signal of the packet substitution means; operation of the packet separation means and the packet separation means Digital broadcasting characterized by comprising control means for controlling broadcasting Signal receiving and recording / reproducing device. 10. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 9, wherein said packet separating means temporarily stores an input signal and a signal stored in said temporary storing means. Detection means for detecting a specific signal; first storage means and second storage means for storing a signal inputted from the control means; and a signal detected by the detection means and the first storage means. Comparing means for comparing the stored signals, and selecting means for selecting whether the input signal or the signal stored in the temporary storage means or the signal stored in the second storage means according to the result of the comparison means, When the specific signal has a predetermined value, part or all of a packet including the specific signal is replaced with a signal stored in the second storage means. Tal broadcast signal receiving and recording / reproducing device. 11. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 10, wherein the specific signal is:
An apparatus for receiving and recording / reproducing a digital broadcast signal, which is at least ID information indicating an attribute of the packet. 12. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 10, wherein a packet to be replaced by said packet replacing means is at least a packet related to selection of said organization channel. For receiving and recording / reproducing digital broadcast signals. 13. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 9, wherein said packet separating unit stores a signal input from said control unit, and said input unit is controlled by said control unit. Digital means for selecting a signal or a signal stored in the storage means, and replacing part or all of a packet with a signal stored in the storage means under the control of the control means. Broadcast signal receiving and recording / reproducing device. 14. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 10, wherein said selecting means is configured to control whether said input signal or a signal stored in a temporary storage means under control of said comparing means and said control means. And selecting a signal stored in the second storage means. When the specific signal has a predetermined value, a part or the whole of the packet including the specific signal is stored in the second storage means. A first mode in which the signal is replaced with a signal stored in the second storage unit irrespective of the value of the specific signal under the control of the control unit. For receiving and recording / reproducing digital broadcast signals. 15. The digital broadcast signal receiving and recording / reproducing apparatus according to claim 14, wherein the second storage circuit stores a plurality of types of signals, and stores the signals from the second storage unit under the control of the control unit. An apparatus for receiving and recording / reproducing a digital broadcast signal, comprising output control means for controlling an output, wherein the control means can select a packet signal after replacement by the replacement means. 16. A digital broadcast signal receiving and recording / reproducing apparatus according to claim 13, wherein said separating means extracts a normal mode for extracting a designated packet, and extracts all packets. An apparatus for receiving and recording / reproducing a digital broadcast signal, wherein the apparatus has a through mode, and when at least the packet replacing means is in the second mode, the separating means operates in a through mode.